Add types for leaflet.pancontrol NPM package (#22618)

* Add types for leaflet.pancontrol NPM package

* Add typescript minimal version because of leaflet dependency

types/leaflet.pancontrol/index.d.ts

@@ -0,0 +1,29 @@
+// Type definitions for leaflet.pancontrol 1.0
+// Project: https://github.com/kartena/Leaflet.Pancontrol
+// Definitions by: Brictarus <https://github.com/Brictarus>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
+
+import { ControlOptions, Control as LControl } from 'leaflet';
+
+declare module 'leaflet' {
+  interface MapOptions {
+    panControl?: boolean;
+  }
+
+  namespace control {
+    function pan(options?: Control.PanControlOptions): Control.Pan;
+  }
+
+  namespace Control {
+    interface PanControlOptions extends ControlOptions {
+      panOffset?: number;
+    }
+
+    class Pan extends LControl {
+      options: PanControlOptions;
+
+      constructor(options?: PanControlOptions);
+    }
+  }
+}

types/leaflet.pancontrol/leaflet.pancontrol-tests.ts

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+import * as L from 'leaflet';
+
+const map = L.map('map', {
+    center: [51.505, -0.09],
+    zoom: 13,
+});
+
+const panControl = L.control.pan({position: 'topright'});
+map.addControl(panControl);

types/leaflet.pancontrol/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6",
+            "dom"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "leaflet.pancontrol-tests.ts"
+    ]
+}

types/leaflet.pancontrol/tslint.json

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+{ "extends": "dtslint/dt.json" }